Abstract: The present invention relates to a pouring plug used for paper containers filled with juice, milk and the like. The present invention further relates to a pouring plug having a flange portion corresponding to a peripheral surface portion of a fitting hole of a container body and being mounted from inside of the container body, in which a plurality of projecting portions are provided, at a height position larger than a thickness dimension of a structural member of the container body form the flange portion, and on the peripheral surface portion corresponding to the inner peripheral edge of the fitting hole. When the pouring plug is inserted and arranged in the fitting hole, the projecting portions are completely withdrawn on the surface side of the container body so that the plug is positively temporarily fixed, and ultrasonic deposition can be carried out without any trouble.

Abstract: A pouring plug adapted to be attached to a container which comprises a pourer (2) attached to a pouring port of the container, a breading blade (4) inserted in the cylindrical section of said pourer (2) and provided with a blade section confronting a film at the lower edge thereof, and a cap, (3) attached rotatably covering said cylindrical section, provided with a pipe member which is inserted in the breaking blade (3), to define opposing surfaces between the pipe member and the breaking blade, (4) one of which is equipped with a guiding section which inclines with a rising gradient in the opening rotational direction ofthe cap (3) and extends from the upper edge side to the lower edge side of the pipe member, and the other of said opposing surfaces being provided with members which are slidably in contact with said guiding inclined section, whereby the breaking blade (4) is adapted to descend upon opening rotation of the cap (3) and wherein each of said guiding inclined sections comprises up to a semicircle